src/content/renderer/compositor_bindings/web_external_texture_layer_impl.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/renderer/compositor_bindings/web_external_texture_layer_impl.h"
   6
   7 #include "cc/layers/texture_layer.h"
   8 #include "cc/resources/resource_update_queue.h"
   9 #include "cc/resources/single_release_callback.h"
  10 #include "cc/resources/texture_mailbox.h"
  11 #include "content/renderer/compositor_bindings/web_external_bitmap_impl.h"
  12 #include "content/renderer/compositor_bindings/web_layer_impl.h"
  13 #include "third_party/WebKit/public/platform/WebExternalTextureLayerClient.h"
  14 #include "third_party/WebKit/public/platform/WebExternalTextureMailbox.h"
  15 #include "third_party/WebKit/public/platform/WebFloatRect.h"
  16 #include "third_party/WebKit/public/platform/WebGraphicsContext3D.h"
  17 #include "third_party/WebKit/public/platform/WebSize.h"
  18 #include "third_party/khronos/GLES2/gl2.h"
  19
  20 using cc::TextureLayer;
  21 using cc::ResourceUpdateQueue;
  22
  23 namespace content {
  24
  25 WebExternalTextureLayerImpl::WebExternalTextureLayerImpl(
  26     blink::WebExternalTextureLayerClient* client)
  27     : client_(client) {
  28   cc::TextureLayerClient* cc_client = client_ ? this : NULL;
  29   scoped_refptr<TextureLayer> layer = TextureLayer::CreateForMailbox(cc_client);
  30   layer->SetIsDrawable(true);
  31   layer_.reset(new WebLayerImpl(layer));
  32 }
  33
  34 WebExternalTextureLayerImpl::~WebExternalTextureLayerImpl() {
  35   static_cast<TextureLayer*>(layer_->layer())->ClearClient();
  36 }
  37
  38 blink::WebLayer* WebExternalTextureLayerImpl::layer() {
  39   return layer_.get();
  40 }
  41
  42 void WebExternalTextureLayerImpl::clearTexture() {
  43   TextureLayer* layer = static_cast<TextureLayer*>(layer_->layer());
  44   layer->ClearTexture();
  45 }
  46
  47 void WebExternalTextureLayerImpl::setOpaque(bool opaque) {
  48   static_cast<TextureLayer*>(layer_->layer())->SetContentsOpaque(opaque);
  49 }
  50
  51 void WebExternalTextureLayerImpl::setPremultipliedAlpha(
  52     bool premultiplied_alpha) {
  53   static_cast<TextureLayer*>(layer_->layer())->SetPremultipliedAlpha(
  54       premultiplied_alpha);
  55 }
  56
  57 void WebExternalTextureLayerImpl::setBlendBackgroundColor(bool blend) {
  58   static_cast<TextureLayer*>(layer_->layer())->SetBlendBackgroundColor(blend);
  59 }
  60
  61 void WebExternalTextureLayerImpl::setRateLimitContext(bool rate_limit) {
  62   static_cast<TextureLayer*>(layer_->layer())->SetRateLimitContext(rate_limit);
  63 }
  64
  65 bool WebExternalTextureLayerImpl::PrepareTextureMailbox(
  66     cc::TextureMailbox* mailbox,
  67     scoped_ptr<cc::SingleReleaseCallback>* release_callback,
  68     bool use_shared_memory) {
  69   blink::WebExternalTextureMailbox client_mailbox;
  70   WebExternalBitmapImpl* bitmap = NULL;
  71
  72   if (use_shared_memory)
  73     bitmap = AllocateBitmap();
  74   if (!client_->prepareMailbox(&client_mailbox, bitmap)) {
  75     if (bitmap)
  76       free_bitmaps_.push_back(bitmap);
  77     return false;
  78   }
  79   gpu::Mailbox name;
  80   name.SetName(client_mailbox.name);
  81   if (bitmap) {
  82     *mailbox = cc::TextureMailbox(bitmap->shared_memory(), bitmap->size());
  83   } else {
  84     *mailbox =
  85         cc::TextureMailbox(name, GL_TEXTURE_2D, client_mailbox.syncPoint);
  86   }
  87   mailbox->set_allow_overlay(client_mailbox.allowOverlay);
  88
  89   if (mailbox->IsValid()) {
  90     *release_callback = cc::SingleReleaseCallback::Create(
  91         base::Bind(&WebExternalTextureLayerImpl::DidReleaseMailbox,
  92                    this->AsWeakPtr(),
  93                    client_mailbox,
  94                    bitmap));
  95   }
  96
  97   return true;
  98 }
  99
 100 WebExternalBitmapImpl* WebExternalTextureLayerImpl::AllocateBitmap() {
 101   if (!free_bitmaps_.empty()) {
 102     WebExternalBitmapImpl* result = free_bitmaps_.back();
 103     free_bitmaps_.weak_erase(free_bitmaps_.end() - 1);
 104     return result;
 105   }
 106   return new WebExternalBitmapImpl;
 107 }
 108
 109 // static
 110 void WebExternalTextureLayerImpl::DidReleaseMailbox(
 111     base::WeakPtr<WebExternalTextureLayerImpl> layer,
 112     const blink::WebExternalTextureMailbox& mailbox,
 113     WebExternalBitmapImpl* bitmap,
 114     unsigned sync_point,
 115     bool lost_resource) {
 116   DCHECK(layer);
 117   blink::WebExternalTextureMailbox available_mailbox;
 118   memcpy(available_mailbox.name, mailbox.name, sizeof(available_mailbox.name));
 119   available_mailbox.syncPoint = sync_point;
 120   if (bitmap)
 121     layer->free_bitmaps_.push_back(bitmap);
 122   layer->client_->mailboxReleased(available_mailbox, lost_resource);
 123 }
 124
 125 }  // namespace content
 126